Grinding-machine.



No; 810,903. PATBNTED JAN. 30, 1906.

G. E. BLBCHSGHMIDT.

GRINDING MAGHINE. APPLICATION FILED D3014, 1 904.

Nita-125585 UNITED STA as Parana OFFICE.

CHARLES E. BLEOHSCHMIDT, OF BELLEVUE, KENTUCKY, ASSIGNOR TO VICTOR SAFE & LOCK (10., OF'CINOINNATI, OHIO, A CORPORATION OF OHIO.

GRINDING-MACHINE.

Patented Jan. 30, 1906.

Application filed December 14, 1904. Serial No. 236,792.

To all whom, it may concern.-

Be it known that I, CHARLES E. BLEoH- sonnmr, a citizen of the United States, residing at Bellevue, Campbell county, State of Kentucky, have invented certain new and useful Improvements in Grinding-Machines; and I do declare the following to be a clear, full, and exact description thereof, attention being called to the accompanying drawing, with the reference characters marked thereon, which forms also a part of this specification.

This invention relates to improvements in machines for smoothing and grinding surfaces, especially such of metal. It is more particularly intended for use on heavy and bulky objects which cannot be readily manipulated or swunglike, for instance, safes and articles or castings of similar size and weight.

The machine is more specifically designed for use on the body and door of safes where such door is circular and is fitted into a correspondingly -shaped opening. Particular work to be done in such connection is the grinding of the tapering surface around the edge of the door and the correspondingly-tapering surface within the opening which receives this door. There are also surfaces to be ground on the outside and front of the safebody and around the door-opening therein.

The invention consists of a grinding-machine embodying one or two grinding-wheels, each mounted on a grinding-spindle and so constructed as to permit adjustment of position to do grinding in the various positions which the particular work above outlined may require. for cutting the complementary threads of a screw in case such a closure is used for holding the safe-door within its opening in the safe-body.

1n the followingspecification, and particui larly pointed out'in the claim, is found a full There is also provision made i which the work is secured by customary attaching devices 11, (chucks, clamping-jaws, &c.,) well known in the art and adjustably seated in undercut grooves 12, sunk in from the upper surface of this table. The work in this case is the body of a safe A, provided with a circular opening a in one of its sides, which opening is intended to receive a correspondingly-shaped door. A grinding-wheel B is shown as grinding thev tapering surface within this opening. Another grindingwheel C is shown as grinding around the edge of the-door-opening on the front of the safe. Each one of these grinding-wheels is mounted on a grinding-spindle 13, one for each, and each spindle mounts a pulley 14:, whereby the grinding-wheels are rotated by means of belts driven from independent counter-shafts. (Not shown.) In order to cause the action of the grinding-w heels to be advanced over the work, this latter is rotated by means of table 10, which latter is accordingly mounted on baseframe 15. The rotation of this table may be accomplished in any suitable manner. ltmay be done by providing on the under side of this table an internal gear-wheel 16, which is en gaged by a pinion 17 on an upright shaft 18 and rotated by a set of bevel-wheels 19, driven by a main shaft 21. This latter is operated by a suitable back-gear or cone-pulley stand 22, which provides for variable-speed changes and is driven by a belt 23from a line orcounter-shaft. The grinding-wheels and their spindles are supported in a manner to be capable of adjustment for the purpose of meeting the work and the position or angle of the particular surfaces thereon to be acted upon. They are furthermore supported in a manner to have a movement over the work, which is f the feed-motion, and whereby the grindingdescription of the invention, together with 5 operation, parts, and construction, which' latter is also illustrated in the accompanying drawing, which is a front elevation of such a grinding machine, showing two grindingwhecls 1n simultaneous operation on a safebody. One is ad usted to grind the tapering surface around the inside of the circular door- 5 opening, while the other is adjusted to do work around this opening on the front of the safe. In the drawing, 10 indicates the'table, upon wheels are caused to advance in their adjusted position over the work. For purposes of adjustment in a general vertical direction a rail 2% is provided and fitted so as to slide vertically on uprights Screws 26 are arranged for this purpose in recesses in thefront of these uprights and supported in a manner so asto be held in a lixed position longitudinally. From the rear side of rail 24 project nuts (not shown) into these recesses and engage the screws therein. so that when these latter are i turned the rail will ascend or drop accordingto direction ol rotation of the screws.

This

rotation is a simultaneous one by means of a shaft 27, the operation of which is transmitted to the screws by sets of bevel-wheels 28. Adjustment in a general horizontal direction is had by means of slides 29, fitted to move on rail 24; and provided on their rear sides with nuts or devices equivalent for the purpose and whereby by means of rods 31, supported in longitudinally fixed positions within a recess in the front of said rail, these slides may be moved back and forth upon rotation of these rods. This rotation may be manually by means of an attached handle or it may be machine-driven by means of a gear-train 32, operated from an upright shaft 33, which latter receives its rotation in any suitable way from main shaft 21-as,-for instance, by a set of friction-wheels 34. The transmission from this upright shaft to gear-train 32 is by bevelwheels back of rail 24 and in a manner customary in machine-tools. The wheel on shaft 33 is mounted to be adjustable across the side of the other Wheel, thus providing for speed changes. For such purpose this adjustable wheel is mounted upon a sleeve 30, fitted to slide upon shaft 33, to which it is held by means of a set-screw, as shown.

Mounted for pivotal adjustment on each slide 29 there is rotary head 35, provided with guiding-supports which may be boxes 36, and whereby the spindle-carriers 37 are adjustably held to this head. Grinding-spindle 13 for grinding-wheel B is contained in its respective carrier 37, the same being hollow, with bearings provided at each end for'the spindle. The grinding-spindle for wheel C is mounted on an angular extension 37, projecting laterally from the respective spindle-carrier. The two spindle-carriers may be moved for adjustment or feed within their supports on rotary heads 35 by means of a rack-and-pinion movement, a rack 38 being provided on each spindle-carrier, and a pinion 39 is mounted on a studshaft 41, which also forms the pivotal center for these rotating heads 35 and about which they are adjustable on slides 29. The spindle-carriers are polygonal, to hold them to a straight sliding movement within their supports. For manipulation of this movement a hand-wheel 42 is provided on each studshaft. When feeding by this movement, machine-driven means may be used to rotate the pinions, which means consists of rods 43, also supported Within the recess in the face of rail 21:. They receive motion from the same upright shaft 33 and gear-train 32, which provides the machine-driven motion for the other rods 31, the operative connection between them and the pinion-shaft 4C1 being by means of a worm and Worm-wheel connection (not shown) back of slide 29. When a pinion is rotated by hand-wheel 42, its worm-wheel connection is cut outthat is, rendered inoperative by adjustment of a detachable connection, which may be a sliding key operated by a handle 44:. All these parts are arranged, constructed, and operated in general on analogous principles found in machine-tool construction. It will now be seen that the grind ing-wheels may be adjusted vertically, horizontally, and angularly, and they may also be moved for'feeding in any one of their adjusted positions. This feed-motion may be manually or machine driven, as explained in each case, the work progressing at the same time while being carried around on the rotary table.

Obviously, of course, one grinding-wheel only might be used. This would, however, require additional machines and necessitate a more frequent moving of the object A and adjustment of the machine.

As now shown, two operations are performed without requiring intermediate movement of the object or adjustment of the machine.

The door which fits into opening a is treated in like manner except that it is attached to table 10 in an inverted position from which it would be if it were in position on the safe, as this latter is shown in the drawings.

Having described my invention, I claim as new- In a grinding-machine, the combination of a work-supporting table, means to rotate it, a rotary grinding-wheel, a spindle on which it is mounted, a pulley on this spindle to rotate it a spindle-carrier, a rotary head on which it is supported to havea sliding adjustment lengthwise, a slide on which this rotary head is mounted for rotary adjustment, a rail on which this slide is supported for transverse adjustment and a frame on which this rail is supported for vertical adjustment In testimony whereof I hereunto set my signature in the presence of two witnesses.

CHARLES E. BLECHSCHMIDT.

Witnesses:

C. SPENGEL, ARTHUR KLINE. 

